Question

How can I get the used size of a sheet in such a format : $A$1:$G$25?
I use:

xls.PublishObjects.Add(
Microsoft.Office.Interop.Excel.XlSourceType.xlSourceRange, 
outputFile, 
wsCurrent.Name, 
"$A$1:$G$25", 
Microsoft.Office.Interop.Excel.XlHtmlType.xlHtmlStatic, 
"dsg", 
"").Publish(true);

But I need to get the whole sheet, not only that $A$1:$G$25 range.

Answer 1

Are you trying to export the whole sheet as HTML? If so you can use the following code without needing to calculate the used range.

xls.PublishObjects.Add(
Microsoft.Office.Interop.Excel.XlSourceType.xlSourceSheet, 
"D:\\Documents\\test2.html",
"Sheet1",
"Sheet1",
Microsoft.Office.Interop.Excel.XlHtmlType.xlHtmlStatic,
"dsg",
"").Publish(true);

Otherwise you can use the following code:

Microsoft.Office.Interop.Excel.Range range = xls.Worksheets[1].UsedRange;
string rangeName = range.Address;